Coloring of copper and its alloys

Coloring of copper and its alloys. On copper and its alloys, a bluish-green bloom imitating a "patina" is most often produced, formed after a long time under the influence of weather conditions. Dość trwałe efekty można również uzyskać barwiąc te metale na kolor niebieski, navy blue or black. Other colors, obtained by chemical methods, they are not very durable and require fixing with varnish coatings.